Antineutrino Detectors Vojtech Bednar, Michaela Fendrychova - - PowerPoint PPT Presentation

Testing of Scintillation Antineutrino Detectors

Report from Student Practice at JINR Vojtech Bednar, Michaela Fendrychova Supevisor: V. Egorov

Dzhelepov Laboratory of Nuclear Problems 25.7.2014

Antineutrino

25.7.2014

Testing of Scintillation Antineutrino Detectors

2

Antineutrino

25.7.2014

Testing of Scintillation Antineutrino Detectors

3

DANSS project

25.7.2014

Testing of Scintillation Antineutrino Detectors

4

Detector

25.7.2014

Testing of Scintillation Antineutrino Detectors

5

• Cube 1 m3 from stripes (100x4x1 cm) or plates (40x20x1 cm)
• Plates with different amount of pTP
• Our task was to determine which are the best

Scintillator plates

• The best plate – the best energy resolution
• Energy resolution depends on the fotoelectron yield
• The number of photoelectrons per 1 MeV energy deposit was

measured

• Different reflective materials were examined
• Responce dependence on the energy deposit position

25.7.2014

Testing of Scintillation Neutrino Detectors

6

Measurement

25.7.2014

Testing of Scintillation Antineutrino Detectors

7

• Signal collected with
• ptical fibers
• Troubles with

breaking of fibers

Measurement

25.7.2014

Testing of Scintillation Antineutrino Detectors

8

Measured spectra

25.7.2014

Testing of Scintillation Neutrino Detectors

9

• Response on 2,2 MeV cosmic muons

1 10 100 1000 10000 100000 200 400 600 800 1000

counts

channel number

plate stripe

Results

25.7.2014

Testing of Scintillation Neutrino Detectors

10

• Stripes: 10 PE/MeV
• Plates:

5 10 15 20 25 30 35 40 45 1 2 3 4

PE/MeV PTP concentration [%]

none PMT1 none PMT2 aluminium teflon

Conclusion

25.7.2014

Testing of Scintillation Neutrino Detectors

11

• The best results for plates with 2 % - 2,5% of pTP
• Plates are 4x better than stripes
• Further step – effect of different POPOP concentration

Thank you for your attention

Questions ?